added Travis CI badge

readme.md

@@ -8,6 +8,7 @@ JavaScript obfuscator for Node.js is a free alternative to [js-obfuscator](https
 
 https://gist.github.com/sanex3339/ffc2876123b52e6d11ce45369fd53acf
 
+[![Build Status](https://travis-ci.org/sanex3339/javascript-obfuscator.svg?branch=master)](https://travis-ci.org/sanex3339/javascript-obfuscator)
 [![npm version](https://badge.fury.io/js/javascript-obfuscator.svg)](https://badge.fury.io/js/javascript-obfuscator)
 
 ## Installation